ABB HT568005 Operation Manual page 103

CAUTION
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Disassembly and assembly
Removing cartridge group
Removing the cartridge group
Unplug cable connector (86515) and unscrew speed sensor (86505)

with O-ring (86506).
Disconnect oil inlet and oil outlet pipes.

Oil orifice plates
An orifice plate for adjusting the oil pressure is fitted in each of the two
oil inlet channels in the bearing casing. When the cartridge group, the
bearing casing or the turbocharger is fitted to the engine, it must be en-
sured that the orifice plates that are specified for the turbocharger have
been installed in the two oil inlet channels.
Check correct installation of oil orifice plates.

Version with compressor wheel cooling system
Remove air supply line. (See also chapter entitled Preliminary remarks /

Layout and functionality)
Operation Manual / TPL76-C
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8.5 Page 101